seems impossible. hehehe ;)

You also have to make the car lighter. I bet you'll save more fuel if you'd upgrade the engines to say, 3.0L V6 in the 97 Camry. Put a turbo to the 3SGE (3SGTE?) in the Corona, 2.2L transplant from the last Prelude SH to the Accord etc.

and of course, get a manual tranny. As surplus swaps go, I think all of them is available in MT.

Well, it may, in manila's typical traffic, yield just about the same FC as the stock engine but will produce a dramatic effect in performance for sure. The smaller but higher HP engine just wont produce the results you're after IMO.